Find closest camera format when resolution is presented more than once (#3062)

pjmedia/src/pjmedia/vid_port.c

@@ -354,17 +354,25 @@ static struct fmt_prop find_closest_fmt(pj_uint32_t req_fmt_id,
 
 	/* Fill the nearest width list. */
 	if (diff_width1 <= diff_width2) {
-	    int k = 1;
-	    pjmedia_rect_size tmp_size = vfd->size;
+	    int k = 0;
+	    while (((k < PJ_ARRAY_SIZE(nearest_width)) &&
+	        (!((vfd->size.w == nearest_width[k].w) &&
+	        (vfd->size.h == nearest_width[k].h))))) {
+	        ++k;
+	    }
+	    if (k < PJ_ARRAY_SIZE(nearest_width)) {
+	        /* resolution was already processed */
+	        continue;
 
+	    }
+	    k = 1;
 	    while(((k < PJ_ARRAY_SIZE(nearest_width)) &&
-		   (GET_DIFF(tmp_size.w, req_fmt_size->w) <
-		   (GET_DIFF(nearest_width[k].w, req_fmt_size->w)))))
+		   (diff_width1 < (GET_DIFF(nearest_width[k].w, req_fmt_size->w)))))
 	    {
 		nearest_width[k-1] = nearest_width[k];
 		++k;
 	    }
-	    nearest_width[k-1] = tmp_size;
+	    nearest_width[k-1] = vfd->size;
 	}
     }
     /* No need to calculate ratio if exact match is found. */